EP0696542A1 - Emballage perforé pour boyaux - Google Patents

Emballage perforé pour boyaux Download PDF

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Publication number
EP0696542A1
EP0696542A1 EP95112413A EP95112413A EP0696542A1 EP 0696542 A1 EP0696542 A1 EP 0696542A1 EP 95112413 A EP95112413 A EP 95112413A EP 95112413 A EP95112413 A EP 95112413A EP 0696542 A1 EP0696542 A1 EP 0696542A1
Authority
EP
European Patent Office
Prior art keywords
film
rows
perforations
sticks
package
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95112413A
Other languages
German (de)
English (en)
Other versions
EP0696542B1 (fr
Inventor
Pierre Yves Auguste Grevin
Francis Antoine Hughes Villaume
Mark Stephen Woessner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viskase Corp
Original Assignee
Viskase Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viskase Corp filed Critical Viskase Corp
Publication of EP0696542A1 publication Critical patent/EP0696542A1/fr
Application granted granted Critical
Publication of EP0696542B1 publication Critical patent/EP0696542B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
    • B65D2585/08—Containers, packaging elements or packages specially adapted for particular articles or materials for compressible or flexible rod-shaped or tubular article
    • B65D2585/085—Shirred sausage casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall

Definitions

  • the present invention relates to an easily opened shirred food casing packaging and, more particularly, to a package including a bundle of shirred casings retained in an easy opening container formed of a resilient stretch or shrink film having a specific arrangement of rows of perforations and removable film panels.
  • Small diameter sausages such as frankfurters or the like usually are made using cellulosic food casings. These casings or the like customarily are manufactured in long, continuous tubes. For handling convenience, these long tubes are gathered into pleats by shirring and are longitudinally compressed by known techniques to obtain a shorter, relatively rigid tube known in the industry as a shirred casing stick.
  • the coherency of the shirred stick is derived in part from the shirring operation which forms the casing into generally conical pleats which nest one within another.
  • the stick is loaded onto a stuffing horn and a food emulsion is fed through the horn and into casing, which is drawn forward from the stick by the stuffing pressure. It is not uncommon for a shirred stick 50 cm long to contain upwards of 50 meters or more of casing, allowing a large number of individual frankfurters to be made with each stick.
  • shirred sticks of this casing are relatively fragile in that the nested pleats of casing formed by the shirring operation are easily separated or pulled apart. If the pleats separate, the stick is said to break or lose "coherency". The result is one or more rigid shirred sections connected by loose unshirred sections. Sticks in this condition are not easily loaded onto a stuffing horn and are not at all suitable for automatic stuffing operations wherein the stick is loaded onto a stuffing horn by mechanical means. Accordingly, the packaging for the shirred sticks must be able to minimize stick breakage.
  • Shirred sticks also are susceptible to damage if made wet. Since stuffing machines frequently are hosed down with water after a stuffing operation, any sticks in the area should be retained in packaging that protects the sticks from damage due to water overspray.
  • Bundling sticks together accomplishes several functions. For example, if the sticks are tight together, there is less likelihood of relative motion between the sticks so the sticks do not rub one against another. Rubbing together of sticks tends to produce undesirable pinhole damage in shirred casing. Also, a tight bundle helps to prevent bowing of individual sticks. Bowing is the result of a number of factors known in the art and is cause for concern because a bowed stick may not load onto a stuffing horn. A tight bundle further tends to reduce the likelihood of stick breakage as long as the bundle remains intact.
  • Conventional packaging for retaining a stick bundle generally is a carton or box comprising a combination of corrugated fiber board (cardboard) and a plastic wrap such as a shrink or stretch film.
  • Packages of this type are rigid, but contain a large amount of cardboard packaging material that must be, generally after a single usage, disposed of, most often in a landfill. Besides generating a potentially large expense for the end user of the product in terms of waste handling and disposal, it is an environmental concern.
  • certain end users of these casings have been prohibited from having cardboard in the meat stuffing area of their processing plant due to an increased risk of biological contamination on the cardboard, as opposed to plastic packaging, which in turn can contaminate the meat product. It is desirable to remove the cardboard while providing a functional, easy to use packaging system of these stick bundles.
  • Another solution to the easy opening problem is shrink wrapping the packaging around the goods to be packaged in such a way that an open space is left at a place on the packaging.
  • the operator can grasp the edges of the open space and pull off the plastic packaging.
  • the problem with this solution is that the tough plastic must be manually ripped, which generally does not follow a straight line, or cut with a sharp object, lending itself to damage of the casing underneath. In both cases, there is only one narrow opening left making removal of the sticks very difficult.
  • Still another solution is placing two rows of perforations longitudinally down the film and multiple rows of perforations transversely between the longitudinal rows to form squares.
  • Various sized openings are made when one or more squares of film are removed. This type of opening has a drawback in that the operator is limited to one orientation of the packaging for opening and emptying at the stuffing machine, which can be difficult in a high pressure situation.
  • the package should further provide protection from water spray, be easily formed, and be easy to open. Finally, such packaging should help to reduce the amount of waste sent to a landfill as compared to the amount sent when cardboard is used.
  • the present invention is characterized in one aspect by a easily opened package of shirred food casing comprising
  • Another aspect of the invention is a film for use in wrapping any goods, but in particular multiple shirred casing sticks in a multisided bundle, comprising an oriented heat shrinkable thermoplastic film that has transversely spaced rows of frangible perforations that extend between the longitudinal edges of the film, where the film between any adjacent rows forms a removable panel, and the spacing between the rows of perforations in relation to the perimeter of the bundle is sufficient to locate at least one of the panels in each of at least two sides of the bundle and is also sufficient so that when the film is wrapped around the bundle at least four rows of perforations occur around the bundle.
  • This invention makes it unexpectedly easier for users of casing, or any goods, wrapped in a resilient film, to open the package with a simple pull at any point along a side edge of the package, so a panel is removed completely from the package leaving a substantial opening from which casing, or any other goods, can be removed from the package as needed.
  • the film is a plastic, it provides a degree of protection from water, and once the container is empty, it can be disposed of using much less landfill space than does cardboard.
  • Figure 1 is a plan view of a sheet of film showing at least one arrangement of rows of perforations according to the present invention.
  • Figure 2 is a perspective end view showing one embodiment of an easy open shirred food casing package of the present invention.
  • Figure 3 is a view similar to Figure 3 only from an opposite end and showing another embodiment of the invention.
  • This invention in one aspect comprises a mono-or bioriented heat shrinkable or stretch plastic film that contains transverse rows of frangible perforations, where a panel of film is formed between the rows.
  • This film is used to package goods, such as multiple shirred sticks of sausage casing, in a tight bundle. At least one end of the bundle is partially open and provides a film edge for grasping to tear open the package.
  • the rows of perforations are spaced apart and arranged in such a way that when the film is disposed about the shirred sticks to form the bundle, there are at least four rows of perforations disposed about the perimeter of the bundle.
  • This provides at least one panel that spans adjacent sections of two sides of the package.
  • the rows of perforations will be such that at least one row will be placed on each side of the package, and one or more of the panels overlap two adjacent sides of the bundle.
  • the panels can be torn from the package by a user grasping the film edge at any point at the partly open end of the package and pulling. It has been found that on a typical bundle of fifty shirred casing sticks, no more than twelve rows of evenly spaced perforations, or six panels, are useful. Increasing the number of rows of perforations and panels weakens the film strength to the point where unintended opening of the package may occur by spontaneous tearing along a line of perforations.
  • Figure 1 shows the film of the present invention indicated at 1.
  • Film 1 is shown as having two longitudinal edges 3 and two transverse edges 4, only one of which is shown.
  • the film further has multiple transverse rows of perforations 2 extending across the width of the film, or transversely, from one film side edge 3 to the other.
  • the rows of perforations 2 are spaced apart so that the distance "D" between them forms a panel 5 large enough to remove the goods that will be wrapped by film 1.
  • the rows of perforations 2 are spaced from about 50 mm to about 100 mm apart and more preferably about 70 mm apart.
  • the film that can be used in the present invention is any plastic film of appropriate gauge for tightly wrapping foods and that can be either heat shrunk or is stretchable and is preferably heat sealable. If the package of goods is to be large and/or heavy, a stronger, possibly heavier gauge film will be needed as opposed to a light or smaller package of goods.
  • Preferably polyethylene films can be used. These films are oriented in the transverse direction and/or the machine (longitudinal) direction by methods well known to those skilled in the art.
  • Various heat shrink films were tested after being wrapped around stacks of shirred casing sticks, and it was found that the functional range of film retraction on the bundle was from about 70% to about 90% longitudinal and from 0% to about 30% transverse shrink.
  • the preferred film has a shrink of about 70% in the longitudinal direction and about 30% in the transverse direction.
  • the rows of perforations 2 can be made as either holes or slits, but slits lying in the transverse direction or having a "v" shape are preferable. It has been found that the use of holes for the perforations yield poor tear efficiencies in that the tear line wanders into the packaging and does not continue on the line of perforation. This may result in the removal of only a part of the panel preventing easy, quick emptying of, and may provoke damage to, the packaged goods.
  • the preferred slits are from about 1 to about 3 millimeters (mm) long, spaced at intervals of about 1 to about 3 mm and can be made with, for example, a sharp edged blade or with a roll provided with appropriately spaced apart knife blades on its surface, as described in US 4,879,124 and 5,086,924.
  • the "v" shaped slits are preferably about 2 mm long and spaced at about 2 mm intervals.
  • Figure 2 shows one embodiment of the package of the present invention.
  • fifty shirred casing sticks 23 are arranged to form a six sided stack, which is tightly wrapped with the film 1 to bundle the sticks together and form package 14.
  • the two transverse ends of the film are connected to each other to maintain tension around the stack and to transversely seal the package shut. This can be accomplished, for example, by heat sealing the edges together to form a seal 10 or by folding the transverse edges of the film and taping them.
  • End 6 of package 14 is completely enclosed by film 1, which can be either stretched or heat shrunk around the bundle.
  • the opposite end 7, not shown in this figure, is partially open.
  • Complete enclosure of end 6 can be accomplished, for example, by having an excess of film that folds on itself around the end, which on heat shrinking will seal to itself. Also, an excess of film may be folded over an end of the stack in such a manner where it can be heat sealed shut. Another method is by gathering an excess of film at one end and placing a metal or plastic clip around the gathered plastic so that an end is fully enclosed.
  • Figure 2 also shows eight rows of perforations 2 so that at least one row of perforations 2 is disposed on each of the six sides and a panel 5 is formed between each set of adjacent rows of perforations.
  • Figure 3 shows another embodiment of the present invention where multiple sticks of casing 23 are arranged on top of each other to form a square stack, which is tightly wrapped by film 1 to form package 30.
  • the transverse edges 4 of the film have been connected to each other by heat sealing to form seal 10.
  • Both end 9 and the opposite end (not shown) are partially enclosed by film 1, substantially as described above.
  • Six rows of perforations are shown on the film on end 9, so that at least one row of perforations 2 is disposed in each of the four sides and at least one of the panels 5 formed between each set of adjacent rows extends over portions of two adjacent sides of the package.
  • a person needing to access the casing sticks 23 inside the package grasps the longitudinal edge 3 of the film at any point at the partially or fully opened end 9 of the package and pulls. This initiates tearing along two adjacent rows of perforations that extend completely across the package. Once the tearing is complete, a full panel 5 can be removed and the casing sticks, or any other goods that have been so packaged, can be removed.
  • This invention is an improvement over most conventional plastic packaging in that in order to access the packaged goods, the user of the goods does not need to cut or rip the plastic or to find the one spot on the plastic film that contains a weakened area, such as a single row of perforations, to open the package.
  • This is a disadvantage especially when time is critically short, as in a high speed manufacturing environment where frankfurters are made.
  • the packaging is plastic, it is water resistant and will protect the sticks from incidental water exposure.
  • the film rated Fail1 did not have enough shrink, and therefore tension, in both longitudinal and transverse directions to hold the stack of sticks tightly together.
  • the film rated Fail2 did not have enough shrink in the longitudinal direction to hold the stack of sticks tightly together.
  • the films rated Very Satisfactory3 had good shrink in both directions and held stacks of sticks tightly together.
  • the films rated Fail4 did not have enough shrink in the longitudinal direction, and too much in the transverse direction, so much so that the packages would not easily release the sticks on opening, causing some sticks to break.
  • the film rated Satisfactory5 showed that there was a slight excess of shrink in the transverse direction and some sticks were not easily released when the package was opened.
  • a number of sheets of bioriented polyethylene film with 70% longitudinal and 30% transverse shrink were perforated with rows of either needle holes or slits with various spacings between each perforation. The rows were made in one direction, transversely along the film, from one longitudinal edge to the other.
  • the film was used to wrap bundles of fifty casing sticks each, as described in Example 1 above. After cooling, the packages of casing sticks were grasped at the 50% open edge and pulled.
  • the % of tear efficiency of each of these rows was measured as the percentage, on average, of the length of perforated line that pulled apart before the tear would propagate into the plastic film away from the rows of perforation.
  • I Impossible to use for wrapping the stack of sticks as only two or three rows of perforations were disposed around the sticks and on opening there was no control of the sticks. Upon opening, the bundle would deteriorate and the sticks would fall out uncontrollably and break.
  • O Satisfactory, as the packaging was easy to open, the encased sticks stayed under control, and were only released from the packaging when expected to.
  • X Unsatisfactory, as thirteen or more rows of perforations were disposed around the sticks and the packaging would spontaneously break open during heat shrinking or handling.
  • Y Unsatisfactory, because for bundles of small diameter casing, there were insufficient rows of perforations in the film to assure at least four rows of perforations disposed about the bundle, giving rise to the conditions "I" above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Wrappers (AREA)
EP19950112413 1994-08-12 1995-08-07 Emballage perforé pour boyaux Expired - Lifetime EP0696542B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28981094A 1994-08-12 1994-08-12
US289810 1994-08-12

Publications (2)

Publication Number Publication Date
EP0696542A1 true EP0696542A1 (fr) 1996-02-14
EP0696542B1 EP0696542B1 (fr) 1998-11-04

Family

ID=23113196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950112413 Expired - Lifetime EP0696542B1 (fr) 1994-08-12 1995-08-07 Emballage perforé pour boyaux

Country Status (4)

Country Link
EP (1) EP0696542B1 (fr)
CA (1) CA2153713C (fr)
DE (1) DE69505751T2 (fr)
ES (1) ES2125534T3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998045186A1 (fr) * 1997-04-08 1998-10-15 Coca-Cola & Schweppes Beverages Ltd. Emballage et machines d'emballage
EP0888976A1 (fr) * 1997-07-01 1999-01-07 Devro-Teepak, Inc. Emballage facile à ouvrir
US6250468B1 (en) 1999-02-10 2001-06-26 Teepak Investments, Inc. Easy to remove overwrap
US6409018B1 (en) 2001-03-21 2002-06-25 Arteva North America S.A.R.L. Caddy of shirred food casing sticks
FR2857939A1 (fr) * 2003-07-24 2005-01-28 Mars Inc Film d'emballage
US7842750B2 (en) 2005-10-06 2010-11-30 Capzo International B.V. Polymer composition containing a heat accumulating phase-change material, a process for producing such a composition and a product in which such a composition is included
GB2499258A (en) * 2012-02-13 2013-08-14 British American Tobacco Co Various Wrappers with Tear Strips for Multiple Containers
EP3683356A1 (fr) * 2019-01-21 2020-07-22 Hiu Tang Lo Papier d'emballage pliable
US11565864B2 (en) 2018-08-17 2023-01-31 Niagara Bottling, Llc Perforated case pack top panel
US12473132B2 (en) 2023-03-09 2025-11-18 Niagara Bottling, Llc Perforated panel for bottle packaging

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040166261A1 (en) 2003-02-20 2004-08-26 Pockat Gregory Robert Heat-shrinkable packaging receptacle
DE102007021045A1 (de) * 2007-05-04 2008-11-06 Poly-Clip System Gmbh & Co. Kg Perforationsverfahren für Schutzumhüllungen, Vorrichtung sowie Folienmaterial hierfür

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB488743A (en) * 1937-04-07 1938-07-13 Hans Hildner Improvements in and relating to transparent foils
FR1191548A (fr) * 1958-02-14 1959-10-20 Perfectionnements aux emballages
FR2199319A5 (fr) * 1972-09-11 1974-04-05 Union Carbide Corp
FR2201219A1 (fr) * 1972-10-03 1974-04-26 Tetra Pak Int
US4586312A (en) 1984-04-02 1986-05-06 Pet Incorporated Method for producing heat shrinkable package with a frangible access panel
US4879124A (en) 1985-10-08 1989-11-07 W. R. Grace & Co.-Conn Perforated cook-in shrink bag
US5086924A (en) 1985-10-08 1992-02-11 W. R. Grace & Co. - Conn. Perforated cook-in shrink bag
EP0614610A1 (fr) * 1993-03-12 1994-09-14 Viskase Corporation Emballage pour boyaux tubulaires plissés et procédé de sa fabrication

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB488743A (en) * 1937-04-07 1938-07-13 Hans Hildner Improvements in and relating to transparent foils
FR1191548A (fr) * 1958-02-14 1959-10-20 Perfectionnements aux emballages
FR2199319A5 (fr) * 1972-09-11 1974-04-05 Union Carbide Corp
FR2201219A1 (fr) * 1972-10-03 1974-04-26 Tetra Pak Int
US4586312A (en) 1984-04-02 1986-05-06 Pet Incorporated Method for producing heat shrinkable package with a frangible access panel
US4879124A (en) 1985-10-08 1989-11-07 W. R. Grace & Co.-Conn Perforated cook-in shrink bag
US5086924A (en) 1985-10-08 1992-02-11 W. R. Grace & Co. - Conn. Perforated cook-in shrink bag
EP0614610A1 (fr) * 1993-03-12 1994-09-14 Viskase Corporation Emballage pour boyaux tubulaires plissés et procédé de sa fabrication

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998045186A1 (fr) * 1997-04-08 1998-10-15 Coca-Cola & Schweppes Beverages Ltd. Emballage et machines d'emballage
GB2324075B (en) * 1997-04-08 2000-12-20 Coca Cola & Schweppes Beverage Packaging and packaging machines therefor
US6490845B1 (en) 1997-04-08 2002-12-10 Coca-Cola Enterprises Limited Packaging and packaging machines therefor
EP0888976A1 (fr) * 1997-07-01 1999-01-07 Devro-Teepak, Inc. Emballage facile à ouvrir
US6250468B1 (en) 1999-02-10 2001-06-26 Teepak Investments, Inc. Easy to remove overwrap
US6409018B1 (en) 2001-03-21 2002-06-25 Arteva North America S.A.R.L. Caddy of shirred food casing sticks
FR2857939A1 (fr) * 2003-07-24 2005-01-28 Mars Inc Film d'emballage
WO2005014424A1 (fr) * 2003-07-24 2005-02-17 Mars, Incorporated Film d'emballage
US7842750B2 (en) 2005-10-06 2010-11-30 Capzo International B.V. Polymer composition containing a heat accumulating phase-change material, a process for producing such a composition and a product in which such a composition is included
GB2499258A (en) * 2012-02-13 2013-08-14 British American Tobacco Co Various Wrappers with Tear Strips for Multiple Containers
US11565864B2 (en) 2018-08-17 2023-01-31 Niagara Bottling, Llc Perforated case pack top panel
EP3683356A1 (fr) * 2019-01-21 2020-07-22 Hiu Tang Lo Papier d'emballage pliable
US12473132B2 (en) 2023-03-09 2025-11-18 Niagara Bottling, Llc Perforated panel for bottle packaging

Also Published As

Publication number Publication date
EP0696542B1 (fr) 1998-11-04
DE69505751D1 (de) 1998-12-10
CA2153713C (fr) 2000-10-17
CA2153713A1 (fr) 1996-02-13
DE69505751T2 (de) 1999-05-27
ES2125534T3 (es) 1999-03-01

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